EP 3891555 A4 20220720 - LIQUID CRYSTAL DISPLAY WITH EXTERNAL RETARDER
Title (en)
LIQUID CRYSTAL DISPLAY WITH EXTERNAL RETARDER
Title (de)
FLÜSSIGKRISTALLANZEIGE MIT EXTERNEM RETARDER
Title (fr)
DISPOSITIF D'AFFICHAGE À CRISTAUX LIQUIDES À RETARDATEUR EXTERNE
Publication
Application
Priority
- US 201862776794 P 20181207
- US 2019065114 W 20191207
Abstract (en)
[origin: WO2020146072A2] A system includes a spatial light modulator comprising a first substrate, a second substrate, and a liquid crystal layer between the first substrate and the second substrate. The spatial light modulator is characterized by a first retardation and a first phase retardation and has a first slow axis for light propagation. A voltage source is configured to apply a drive voltage to the spatial light modulator and the first retardation of the spatial light modulator is a function of the drive voltage. A retarder is positioned external to the spatial light modulator and is characterized by a second retardation and a second phase retardation. The retarder includes a second slow axis for light propagation. The second retardation has a value such that all illumination wavelengths in a set of illumination wavelengths are above or below a phase retardation value of 0.25. The set of illumination wavelengths includes at least one illumination wavelength in each of at least three different color spectrums.
IPC 8 full level
G02F 1/1335 (2006.01); G02F 1/133 (2006.01); G02F 1/13363 (2006.01); G02F 1/1362 (2006.01); G02F 1/137 (2006.01); G02B 5/30 (2006.01); G02B 27/01 (2006.01); G02B 27/28 (2006.01); G03B 21/00 (2006.01)
CPC (source: EP KR US)
G02B 5/3083 (2013.01 - EP); G02F 1/133528 (2013.01 - KR); G02F 1/133531 (2021.01 - US); G02F 1/133553 (2013.01 - KR); G02F 1/13363 (2013.01 - EP KR US); G02F 1/133638 (2021.01 - US); G02F 1/136277 (2013.01 - EP US); G03B 21/006 (2013.01 - EP); G02B 27/017 (2013.01 - EP); G02F 1/133528 (2013.01 - EP); G02F 1/133553 (2013.01 - EP); G02F 1/133638 (2021.01 - EP); G02F 2203/02 (2013.01 - EP); G02F 2203/04 (2013.01 - EP); G02F 2203/12 (2013.01 - EP); G02F 2413/05 (2013.01 - EP KR US)
Citation (search report)
- [A] US 2009002579 A1 20090101 - TAN KIM LEONG [US]
- [A] US 5576854 A 19961119 - SCHMIDT JACK H [US], et al
- [XAI] HENDRIX KAREN ET AL: "Birefringent films for contrast enhancement of liquid crystal on silicon projection systems", JOURNAL OF VACUUM SCIENCE, AMERICAN INSTITUTE OF PHYSICS, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747, vol. 24, no. 4, 23 June 2006 (2006-06-23), pages 1546 - 1551, XP012091119, ISSN: 0734-2101, DOI: 10.1116/1.2189263
- See also references of WO 2020146072A2
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2020146072 A2 20200716; WO 2020146072 A3 20201105; CN 113196154 A 20210730; EP 3891555 A2 20211013; EP 3891555 A4 20220720; JP 2022511034 A 20220128; JP 7337313 B2 20230904; KR 102562650 B1 20230803; KR 20210119387 A 20211005; TW 202028835 A 20200801; TW I826607 B 20231221; US 11782315 B2 20231010; US 2022050332 A1 20220217; US 2023350247 A1 20231102
DOCDB simple family (application)
US 2019065114 W 20191207; CN 201980080785 A 20191207; EP 19908888 A 20191207; JP 2021531741 A 20191207; KR 20217021377 A 20191207; TW 108144770 A 20191206; US 201917297811 A 20191207; US 202318347351 A 20230705